Magician hands all props to audience to examine. A volunteer places the block into tube and secures it with a stick. As everyone knows, it is impossible for the block to exit the tube while the stick is in place. Of course, as the stick is removed the block can fall. However, here is an exception. The magician plans to attempt the impossible - getting the block to drop out, even though the stick remains secured. After he succeeds in this amazing feat, the audience can re-examine all of the props.